20747551652 has 6 divisors (see below), whose sum is σ = 36308215398. Its totient is φ = 10373775824.

The previous prime is 20747551651. The next prime is 20747551709. The reversal of 20747551652 is 25615574702.

It can be written as a sum of positive squares in only one way, i.e., 20510822656 + 236728996 = 143216^2 + 15386^2 .

It is not an unprimeable number, because it can be changed into a prime (20747551651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2593443953 + ... + 2593443960.

It is an arithmetic number, because the mean of its divisors is an integer number (6051369233).

Almost surely, 2^20747551652 is an apocalyptic number.

It is an amenable number.

20747551652 is a deficient number, since it is larger than the sum of its proper divisors (15560663746).

20747551652 is a wasteful number, since it uses less digits than its factorization.

20747551652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5186887917 (or 5186887915 counting only the distinct ones).

The product of its (nonzero) digits is 588000, while the sum is 44.

The spelling of 20747551652 in words is "twenty billion, seven hundred forty-seven million, five hundred fifty-one thousand, six hundred fifty-two".